mc68hc908lb8 Freescale Semiconductor, Inc, mc68hc908lb8 Datasheet - Page 102
mc68hc908lb8
Manufacturer Part Number
mc68hc908lb8
Description
M68hc08 Microcontrollers Microcontroller
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC908LB8.pdf
(234 pages)
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High Resolution PWM (HRP)
102
Care must be taken when setting the duty cycle and deadtime values to
ensure that a PWM signal appears on both TOP and BOT when using the
module to control a half bridge. It is possible to configure the HRP to output
a continuous logic 0 on TOP or BOT.
If the deadtime is equal to or greater than the duty cycle value, the BOT
output will will remain at logic 0, while TOP will output a PWM signal. (See
Figure
Similarly, if the deadtime is equal to or greater than the period minus the
duty cycle value, the TOP output will remain at logic 0, while BOT will output
a PWM signal. (See
TOP OUT
BOT OUT
TOP IN
BOT IN
10-8.) The duty cycle refers to the high level on BOT.
Figure 10-7. Deadtime Insertion Waveforms
DT[7:0]
Figure
MC68HC908LB8 Data Sheet, Rev. 1
DT[7:0]
10-9.)
NOTE
Freescale Semiconductor
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